GPNolva by Geneza Pharmaceuticals is an oral preparation containing 20mg of the substance Tamoxifen.
This product is most often referred to as "Nolvadex" by bodybuilders. Nolvadex is not a steroid, rather a selective estrogen blocker. While Nolvadex doesn't prevent the buildup of estrogen in the body, it does prevent it from acting on certain receptors, most notably, those located in the nipples. This has obvious benefits to bodybuilders, because this is the area in which "gyno" occurs during the use of aromatizing steroids such as testosterone.
Nolvadex also offers another great benefit to bodybuilders due to the fact that it can greatly increase the amount of testosterone that the body makes by stimulating LH production. This makes the drug a great choice for PCT.
While the drug has obvious benefits concerning estrogen buildup in the body, it is important to note that it can have adverse effects towards progesterone related steroids. Because of this, it's recommended that bodybuilders don't use Nolvadex in conjunction with steroids such as Deca or Trenbolone.
It's also important to note that Nolvadex doesn't reduce estrogen throughout the body, and that those athletes looking to minimize overall water retention and bloat should look towards true estrogen blockers such as Anastrozole or Exemestane. Bodybuilders often use Nolvadex in doses of 25-75mgs a day throughout cycle duration where gyno is a concern. Those looking to incorporate Nolvadex into their PCT program will typically run the substance at similar doses for 4-6 upon the discontinued use of all steroids. Users may also choose to add proviron and/or HCG to their PCT protocol.